Prior to the COVID-19 pandemic, the university educational system in Nigeria largely employed traditional, face-to-face classroom approaches for teaching. This study examines how mathematics lecturers adapted to online teaching in response to COVID-19 restrictions. A mixed methods approach was used to obtain both qualitative and quantitative data from ten mathematics and mathematics education lecturers, using questionnaires and semi-structured interviews. The results highlight mathematics and mathematics education lecturers' use of virtual boards, writing pads, and WhatsApp to improve interactions while teaching online via Zoom.